On Dienstag, 11. März 2014 21:06:20 CEST, Hongze Zhao wrote:
Hi List,
I am curious about how screenshot in an OS running Xorg works? I guess
Linux does not provide such a system call or interface. Is screenshot
implemented by calling a special xorg interface?
Coding C(++):
XLib: http://tronche.com/gui/x/xlib/graphics/XGetImage.html
xcb: http://www.x.org/archive/current/doc/man/man3/xcb_get_image.3.xhtml
As user tool, xwd should be available everywhere (?), the DEs provide their own
utils and there're plenty of other tools to provide this, but afaik no common
call to trigger the desktop aware screenshot utility.
Cheers,
Thomas
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